chore: import upstream snapshot with attribution

apps/sim/lib/webhooks/polling/registry.ts

@@ -0,0 +1,27 @@
+import { gmailPollingHandler } from '@/lib/webhooks/polling/gmail'
+import { googleCalendarPollingHandler } from '@/lib/webhooks/polling/google-calendar'
+import { googleDrivePollingHandler } from '@/lib/webhooks/polling/google-drive'
+import { googleSheetsPollingHandler } from '@/lib/webhooks/polling/google-sheets'
+import { hubspotPollingHandler } from '@/lib/webhooks/polling/hubspot'
+import { imapPollingHandler } from '@/lib/webhooks/polling/imap'
+import { outlookPollingHandler } from '@/lib/webhooks/polling/outlook'
+import { rssPollingHandler } from '@/lib/webhooks/polling/rss'
+import type { PollingProviderHandler } from '@/lib/webhooks/polling/types'
+
+const POLLING_HANDLERS: Record<string, PollingProviderHandler> = {
+  gmail: gmailPollingHandler,
+  'google-calendar': googleCalendarPollingHandler,
+  'google-drive': googleDrivePollingHandler,
+  'google-sheets': googleSheetsPollingHandler,
+  hubspot: hubspotPollingHandler,
+  imap: imapPollingHandler,
+  outlook: outlookPollingHandler,
+  rss: rssPollingHandler,
+}
+
+export const VALID_POLLING_PROVIDERS = new Set(Object.keys(POLLING_HANDLERS))
+
+/** Look up the polling handler for a provider. */
+export function getPollingHandler(provider: string): PollingProviderHandler | undefined {
+  return POLLING_HANDLERS[provider]
+}